// env 保存这很多环境变量
const { env } = process;

console.log(env);
/*
{
  PROCESSOR_ARCHITECTURE: 'AMD64',
  ANDROID_HOME: 'D:\\Softwares\\adt-bundle\\sdk',
  PROMPT: '$P$G',
  PSExecutionPolicyPreference: 'RemoteSigned',
  VBOX_MSI_INSTALL_PATH: 'D:\\software\\VirtualBox\\',
  PROGRAMFILES: 'C:\\Program Files',
  PROCESSOR_REVISION: '3c03',
  PROGRAMDATA: 'C:\\ProgramData',
  TMP: 'C:\\Users\\TEMP~1.PC-\\AppData\\Local\\Temp',
  USERPROFILE: 'C:\\Users\\TEMP.PC-201412061301',
  CATALINA_HOME: 'D:\\Softwares\\apache-tomcat-8.0.43',
  JAVA_HOME: 'D:\\Softwares\\jdk1.8',
  COMSPEC: 'C:\\Windows\\system32\\cmd.exe',
  LOCALAPPDATA: 'C:\\Users\\TEMP.PC-201412061301\\AppData\\Local',
  COMPUTERNAME: 'PC-201412061301',
  NUMBER_OF_PROCESSORS: '2',
  JRE_HOME: 'D:\\Softwares\\jre1.8',
  SYSTEMDRIVE: 'C:',
  SESSIONNAME: 'Console',
  ANT_HOME: 'D:\\apache-ant-1.9.6',
  ALLUSERSPROFILE: 'C:\\ProgramData',
  PROCESSOR_IDENTIFIER: 'Intel64 Family 6 Model 60 Stepping 3, GenuineIntel',
  CLASSPATH: '.;D:\\Softwares\\jdk1.8\\lib\\tools.jar;D:\\Softwares\\jdk1.8\\lib\\dt.jar;%CATALINA%\\bin;',
  CHOCOLATEYINSTALL: 'C:\\ProgramData\\chocolatey',
  HOMEPATH: '\\Users\\TEMP.PC-201412061301',
  PATHEXT: '.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.RB;.RBW',
  'COMMONPROGRAMFILES(X86)': 'C:\\Program Files (x86)\\Common Files',
  COMMONPROGRAMW6432: 'C:\\Program Files\\Common Files',
  WINDOWS_TRACING_FLAGS: '3',
  TEMP: 'C:\\Users\\TEMP~1.PC-\\AppData\\Local\\Temp',
  USERNAME: 'Administrator',
  HOMEDRIVE: 'C:',
  SYSTEMROOT: 'C:\\Windows',
  MAVEN_OPTS: '-Xms256m -Xmx512m',
  WINDOWS_TRACING_LOGFILE: 'C:\\BVTBin\\Tests\\installpackage\\csilogfile.log',
  MAVEN_HOME: 'D:\\software\\apache-maven-3.3.1',
  MAVEN: 'D:\\software\\apache-maven-3.3.1\\bin;%M2_HOME%\\bin',
  PROCESSOR_LEVEL: '6',
  HADOOP_HOME: 'D:\\Softwares\\hadoop-on-windows\\hadoop-2.7.3\\',
  PROGRAMW6432: 'C:\\Program Files',
  DEVMGR_SHOW_DETAILS: '1',
  APPDATA: 'C:\\Users\\TEMP.PC-201412061301\\AppData\\Roaming',
  USERDOMAIN: 'PC-201412061301',
  FP_NO_HOST_CHECK: 'NO',
  PUBLIC: 'C:\\Users\\Public',
  TNS_ADMIN: 'D:\\install\\PLSQL\\instantclient_11_2',
  NLS_LANG: 'SIMPLIFIED CHINESE_CHINA.ZHS16GBK',
  COMMONPROGRAMFILES: 'C:\\Program Files\\Common Files',
  LOGONSERVER: '\\\\PC-201412061301',
  'PROGRAMFILES(X86)': 'C:\\Program Files (x86)',
  SHPLAYER: 'D:\\software\\搜狐影音\\5.2.0.29',
  PATH: 'D:\\Softwares\\Ruby23-x64\\bin;D:\\Softwares\\oracle\\app\\Administrator\\product\\11.2.0\\dbhome_1\\bin;C:\\Wi
  ndows\\ system32\\ WindowsPowerShell\\ v1 .0\\;D: \\software\\ eclipse\\ java - mars\\ eclipse\\ sdk\\ platform - tools;C: \\Windows\\ s
  ystem32;C: \\Windows;C: \\Windows\\ System32\\ Wbem;C: \\Windows\\ System32\\ WindowsPowerShell\\ v1 .0\\;D: \\software\\ mysql\\ b in ;D: \\software\\ MySQL Server 5.5\\ bin;D: \\software\\ MySQL\\ MySQL Server 5.5\\ bin;D: \\apache - ant - 1.9 .6\\ bin;D: \\software\\ eclipse\\ java - mars\\ eclipse\\ sdk\\ platform - tools;D: \\software\\ eclipse\\ java - mars\\ eclipse\\ sdk\\ tools;C: \\Program Fil
  es\\ TortoiseSVN\\ bin;C: \\Users\\ Administrator.PC - 201412061301.000\\ AppData\\ Roaming\\ npm;C: \\ProgramData\\ chocolatey\\ bi
  n;D: \\Softwares\\ Python2 .7\\;D: \\software\\ Git\\ bin;D: \\CODING\\ font\\ FDK\\ Tools\\ win;D: \\Softwares\\ mongoDB\\ bin;
  "D:\\s
  oftware\\ Sublime Text 3\\ ";D:\\Softwares\\jdk1.8\\bin;D:\\Softwares\\jre1.8\\bin;D:\\software\\apache-maven-3.3.1\\bin;%
  M2_HOME % \\bin;D: \\Softwares\\ redis - 3;D: \\Softwares\\ hadoop - on - windows\\ hadoop - 2.7 .3\\\\ bin;D: \\Softwares\\ Brackets\\ comm
  and;D: \\Softwares\\ adt - bundle\\ sdk\\ platform - tools;D: \\Softwares\\ adt - bundle\\ sdk\\ tools;C: \\Program Files\\ nodejs\\;C: \\Program Files\\ TortoiseGit\\ bin;D: \\software\\ 搜狐影音\\ 5.2 .0 .29;C: \\Users\\ TEMP.PC - 201412061301\\ AppData\\ Roaming\\ npm ',
  OS: 'Windows_NT',
  WINDIR: 'C:\\Windows',
  PSMODULEPATH: 'D:\\Documents\\WindowsPowerShell\\Modules;C:\\Windows\\system32\\WindowsPowerShell\\v1.0\\Modules\\',
  SUBLIME_TERMINAL_PATH: 'C:\\Users\\TEMP~1.PC-\\AppData\\Roaming\\SUBLIM~1\\Packages\\Terminal'
};*/